source_remote imageboot.sh is the last thing the diskless cmdline hook
runs, so returning early on a failed extraction ended the hook and left
dracut to time out. Falling through instead reaches the existing
/sysroot/sbin/init guard, which reports the failure and holds the node so
it stays reachable over ssh, as it did before extraction was checked.
`unsquashfs` can use multiple CPU cores during image extraction, significantly reducing boot time.
For example the whole boot time from PXE to shell on a 8-core VM, from approximately 45 seconds to 20 seconds.
This PR adds `squashfs-tools` as a dependency. Since the package is smaller than 1 MB, the additional image size is justified by the performance improvement.
For backward compatibility, the existing `cp`-based extraction method is used when `unsquashfs` is unavailable, such as with images built before this change.
The extraction logic has also been moved into the common functions and is now shared between EL9, EL10, and Ubuntu.
Both untethered `squashfs` images and `confluent_multisquash` images are supported.
Images must be rebuilt to include `unsquashfs` and benefit from the faster extraction path.
For one, ensure a unique machine-id. Broadly should be done, but critical for bonds to have unique mac
addressses in event of booting a captured image.
Fix ubuntu slow boot due to waiting forever for a network config. Have the transient network config bake into netplan for
a first pass before confignet comes along to do full configuration.
Clean up spurious error messages about grep true: and device busy on mounting overlay.
Needed the real losetup to handle read-only file.
busybox wc is way too slow, use ls instead.
Explicitly make /sysroot and load xfs, as that doesn't happen implicitly.
Accept a dangling symlink as viable init, since this is the case in Ubuntu.
Update hostname and ca certificates consistent with
ubuntu standards
Markus Hilger
Jarrod Johnson